Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
This paper uses random assignment of students to investigate the impact of study groups and roommates on academic achievement. We find that informal social interaction with roommates has a significant positive impact on academic achievement, while study group peers have no discernible impact, a result driven by group heterogeneity in ability. We also find that lower-ability students benefit from high-ability students but not vice versa. © 2015 The President and Fellows of Harvard College and the Massachusetts Institute of Technology